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Figure B.7. Phases of MBMS Broadcast Service Provisioning. 146<br />
The sequence of phases may repeat (e.g. depending on the need to transfer data). It is also possible that<br />
the service announcement and MBMS notification phase may run in parallel with other phases, in order to<br />
inform UEs that have not yet received the related service.<br />
1. Service Announcement. Informs UEs about forthcoming MBMS user services<br />
2. Session Start. The point at which the BM-SC is ready to send data and triggers bearer resource<br />
establishment for MBMS data transfer<br />
3. MBMS Notification. Informs the UEs about forthcoming (and potentially about ongoing) MBMS<br />
broadcast data transfer<br />
4. Data Transfer. The phase where MBMS data is transferred to the UEs<br />
5. Session Stop. The point at which the MBMS user service determines that there will be no more<br />
data to send for a period of time that is long enough to justify removal of bearer resources<br />
associated with the service.<br />
146 3GPP TS 23.246 Figure 4.<br />
Service announcement<br />
Session Start<br />
MBMS notification<br />
Data transfer<br />
Session Stop<br />
www.4gamericas.org February 2011 Page 133
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